/* ── 拾光笔记 全局设计系统 v2 ── */
/* Stage 1: UI统一。以 DESIGN_SYSTEM.md V2.0 为准，先统一全站基础观感。 */

:root {
    /* ══════════════════════════════════════
       拾光笔记 Design Tokens v4
       设计方向：安静学习空间 · 白底导航 · 蓝紫主色
       ══════════════════════════════════════ */

    /* ── 品牌主色（Design System V2.0） ── */
    --color-primary-50:  #eef2ff;
    --color-primary-100: #e0e7ff;
    --color-primary-300: #a5b4fc;
    --color-primary-500: #4f6ef7;
    --color-primary-600: #3b5de7;
    --color-primary-700: #3348b8;
    --color-primary-900: #1e293b;

    /* ── 品牌辅色：第一阶段只保留为弱强调，不作为主按钮色 ── */
    --color-accent-500: #f59e0b;
    --color-accent-100: #fffbeb;

    /* ── 语义色 ── */
    --color-success: #22c55e;
    --color-warning: #f59e0b;
    --color-danger:  #ef4444;
    --color-info:    #3b82f6;

    /* ── 覆盖 Bootstrap 5.3 CSS 变量 ── */
    --bs-primary:       var(--color-primary-500);
    --bs-primary-rgb:   79, 110, 247;
    --bs-success:       var(--color-success);
    --bs-success-rgb:   34, 197, 94;
    --bs-warning:       var(--color-warning);
    --bs-warning-rgb:   245, 158, 11;
    --bs-danger:        var(--color-danger);
    --bs-danger-rgb:    239, 68, 68;
    --bs-info:          var(--color-info);
    --bs-info-rgb:      59, 130, 246;

    /* ── 中性色（Design System V2.0） ── */
    --color-bg:        #fafbfc;
    --color-surface:   #ffffff;
    --color-surface-2: #f1f5f9;
    --color-border:    #e2e8f0;
    --color-text-1:    #1e293b;
    --color-text-2:    #64748b;
    --color-text-3:    #94a3b8;

    /* ── 排版 ── */
    --font-body: -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans SC", "Microsoft YaHei", sans-serif;
    --font-mono: "JetBrains Mono", "Fira Code", "Cascadia Code", Consolas, monospace;
    --font-serif: "Noto Serif SC", "Source Han Serif SC", "SimSun", serif;
    --fs-xs:   12px;
    --fs-sm:   13px;
    --fs-base: 14px;
    --fs-lg:   16px;
    --fs-xl:   18px;
    --fs-2xl:  22px;
    --lh-tight: 1.25;
    --lh-base:  1.6;

    /* ── 间距 ── */
    --space-1: 4px;
    --space-2: 8px;
    --space-3: 12px;
    --space-4: 16px;
    --space-6: 24px;
    --space-8: 32px;
    --space-xs: 4px;
    --space-sm: 8px;
    --space-md: 16px;
    --space-lg: 24px;
    --space-xl: 32px;
    --space-2xl: 48px;

    /* ── 阴影 ── */
    --shadow-sm:    0 1px 3px rgba(0,0,0,.06), 0 1px 2px rgba(0,0,0,.04);
    --shadow-md:    0 1px 3px rgba(0,0,0,.06), 0 1px 2px rgba(0,0,0,.04);
    --shadow-lg:    0 20px 60px rgba(0,0,0,.15);
    --shadow-hover: 0 4px 12px rgba(0,0,0,.08);

    /* ── 圆角 ── */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;

    /* ── 过渡 ── */
    --transition: 150ms ease;

    /* ══════════════════════════════════════
       向后兼容别名（旧代码引用这些变量名）
       ══════════════════════════════════════ */
    --bg-page:        var(--color-bg);
    --bg-card:        var(--color-surface);
    --bg-nav:         var(--color-surface);
    --text-primary:   var(--color-text-1);
    --text-secondary: var(--color-text-2);
    --text-muted:     var(--color-text-3);
    --border-color:   var(--color-border);
    --color-primary:        var(--color-primary-500);
    --color-primary-hover:  var(--color-primary-600);
    --color-primary-rgb:    79, 110, 247;
    --bg-nav-rgb:           255, 255, 255;
}

[data-bs-theme="dark"],
[data-theme="dark"] {
    --color-bg:        #1a1d21;
    --color-surface:   #282c34;
    --color-surface-2: #2a2e36;
    --color-border:    #3a4048;
    --color-text-1:    #e8ecf2;
    --color-text-2:    #b0b8c4;
    --color-text-3:    #8896a8;

    --shadow-sm:    0 2px 6px rgba(0,0,0,0.25);
    --shadow-md:    0 4px 12px rgba(0,0,0,0.3);
    --shadow-lg:    0 10px 32px rgba(0,0,0,0.35);
    --shadow-hover: 0 8px 24px rgba(0,0,0,0.4);

    /* 向后兼容别名覆盖 */
    --bg-page:        var(--color-bg);
    --bg-card:        var(--color-surface);
    --bg-nav:         var(--color-primary-900);
    --text-primary:   var(--color-text-1);
    --text-secondary: var(--color-text-2);
    --text-muted:     var(--color-text-3);
    --border-color:   var(--color-border);

    color-scheme: dark;
}

/* 暗色模式全局文本增强 */
[data-bs-theme="dark"] body,
[data-theme="dark"] body { color: #e8ecf2; }
[data-bs-theme="dark"] .text-muted,
[data-theme="dark"] .text-muted { color: #8896a8 !important; }
[data-bs-theme="dark"] small.text-muted,
[data-theme="dark"] small.text-muted { color: #b0b8c4 !important; }
[data-bs-theme="dark"] .form-control,
[data-theme="dark"] .form-control { background: #1e2127; color: #e8ecf2; border-color: #3a4048; }
[data-bs-theme="dark"] .form-control:focus,
[data-theme="dark"] .form-control:focus { background: #1e2127; color: #fff; border-color: var(--color-primary); }
[data-bs-theme="dark"] .form-select,
[data-theme="dark"] .form-select { background-color: #1e2127; color: #e8ecf2; border-color: #3a4048; }
[data-bs-theme="dark"] .bg-light,
[data-theme="dark"] .bg-light { background-color: #2a2e36 !important; color: #e8ecf2 !important; }
[data-bs-theme="dark"] .list-group-item,
[data-theme="dark"] .list-group-item { background: var(--bg-card); color: #e8ecf2; border-color: var(--border-color); }
[data-bs-theme="dark"] .card-header.bg-white,
[data-theme="dark"] .card-header.bg-white { background: #2a2e36 !important; border-color: var(--border-color); }
[data-bs-theme="dark"] .badge.bg-light,
[data-theme="dark"] .badge.bg-light { background: #3a4048 !important; color: #c0c8d4 !important; }
[data-bs-theme="dark"] .modal-content,
[data-theme="dark"] .modal-content { background: #282c34; color: #e8ecf2; }
[data-bs-theme="dark"] .dropdown-menu,
[data-theme="dark"] .dropdown-menu { background: #282c34; border-color: #3a4048; }
[data-bs-theme="dark"] .dropdown-item,
[data-theme="dark"] .dropdown-item { color: #c0c8d4; }
[data-bs-theme="dark"] .dropdown-item:hover,
[data-theme="dark"] .dropdown-item:hover { background: #3a4048; color: #fff; }
[data-bs-theme="dark"] .alert-info,
[data-theme="dark"] .alert-info { background: #1a3a4a; color: #8cd0e8; border-color: #2a5a6a; }
[data-bs-theme="dark"] .alert-warning,
[data-theme="dark"] .alert-warning { background: #3a3020; color: #e0c880; border-color: #5a5030; }
[data-bs-theme="dark"] #id_text,
[data-theme="dark"] #id_text { background: #1e2127; color: #e8ecf2; }
[data-bs-theme="dark"] .markdown-body,
[data-theme="dark"] .markdown-body { color: #e8ecf2; }
[data-bs-theme="dark"] .accordion-button,
[data-theme="dark"] .accordion-button { background: #2a2e36; color: #e8ecf2; }
[data-bs-theme="dark"] .accordion-button:not(.collapsed),
[data-theme="dark"] .accordion-button:not(.collapsed) { background: #303540; color: #fff; }

/* ── 基础重置 ── */
* { box-sizing: border-box; }

body {
    background: var(--color-bg);
    color: var(--color-text-1);
    font-family: var(--font-body);
    font-size: var(--fs-base);
    line-height: var(--lh-base);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    transition: background var(--transition), color var(--transition);
}

/* ── 导航栏 ── */
.custom-navbar {
    background: var(--bg-nav) !important;
    box-shadow: var(--shadow-sm);
    backdrop-filter: blur(8px);
    min-height: 56px;
}
/* 渐变主题：导航栏用渐变背景 */
[data-sg-gradient="true"] .custom-navbar {
    background: var(--sg-nav-gradient) !important;
    border-bottom: none;
}
[data-sg-gradient="true"] .custom-navbar .navbar-brand,
[data-sg-gradient="true"] .custom-navbar .navbar-nav .nav-link,
[data-sg-gradient="true"] .custom-navbar .navbar-text {
    color: #fff !important;
    text-shadow: 0 1px 2px rgba(0,0,0,0.15);
}
[data-sg-gradient="true"] .custom-navbar .btn-outline-light {
    color: #fff; border-color: rgba(255,255,255,0.6);
}
/* 背景渐变（亮暗均半透明原色叠加深/浅底；动态流动，速度/强度可调） */
[data-sg-bg-gradient="true"] body {
    background-color: var(--sg-bg);
    background-image: var(--sg-page-gradient);
    background-attachment: fixed;
    background-size: var(--sg-aurora-size, 320% 320%);
    animation: sg-aurora var(--sg-aurora-duration, 9s) ease-in-out infinite;
    will-change: background-position;
}
@keyframes sg-aurora {
    0%   { background-position: 0% 0%; }
    20%  { background-position: 35% 100%; }
    40%  { background-position: 100% 60%; }
    60%  { background-position: 70% 20%; }
    80%  { background-position: 30% 90%; }
    100% { background-position: 0% 0%; }
}
.navbar-brand { font-weight: 700; letter-spacing: 0.5px; }
.nav-link {
    border-radius: var(--radius-sm);
    padding: 6px 14px !important;
    transition: all var(--transition);
}
.nav-link:hover {
    background: rgba(255,255,255,0.08);
}
.nav-link.active,
.nav-link[aria-current="page"] {
    color: #fff !important;
    position: relative;
}
.nav-link.active::after,
.nav-link[aria-current="page"]::after {
    content: '';
    position: absolute;
    bottom: 2px;
    left: 14px;
    right: 14px;
    height: 2px;
    background: var(--color-primary-300);
    border-radius: 1px;
}

/* ── 卡片系统 v3 ── */
.card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    transition: all var(--transition);
}
.card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-hover);
}
.card-header {
    background: transparent;
    border-bottom: 1px solid var(--color-border);
    font-weight: 600;
    font-size: var(--fs-base);
    padding: var(--space-4) var(--space-6);
}
.card-body {
    padding: 20px;
}
.card-footer {
    background: transparent;
    border-top: 1px solid var(--color-border);
    padding: var(--space-4) var(--space-6);
}
.card.border-0 { border: none; }
.card.shadow-sm { box-shadow: var(--shadow-sm); }

/* 统计指标卡片 */
.card-stat {
    text-align: center;
    min-height: 110px;
}
.card-stat .stat-number {
    font-size: var(--fs-2xl);
    font-weight: 700;
    line-height: 1.2;
    color: var(--color-text-1);
}
.card-stat .stat-label {
    font-size: var(--fs-xs);
    color: var(--color-text-2);
    margin-top: var(--space-1);
}

/* 暗色模式 */
[data-bs-theme="dark"] .card,
[data-theme="dark"] .card {
    background: var(--color-surface);
    border-color: var(--color-border);
}
[data-bs-theme="dark"] .card-header.bg-white,
[data-theme="dark"] .card-header.bg-white {
    background: var(--color-surface-2) !important;
    border-color: var(--color-border);
}

/* ── 响应式卡片网格 ── */
.card-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}
@media (max-width: 1199.98px) {
    .card-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 767.98px) {
    .card-grid { grid-template-columns: 1fr; }
}
.card-grid .card {
    min-width: 0;
    min-height: 0;
}

/* ── 文本溢出截断 ── */
.text-truncate-2 {
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}
.text-truncate-3 {
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}
.overflow-ellipsis {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}
.min-w-0 { min-width: 0; }

/* ── 发现页卡片 ── */
.explore-card {
    transition: all var(--transition);
}
.explore-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-hover);
}
.explore-card .card-title a {
    color: var(--color-primary-500);
}
.explore-card .card-title a:hover {
    color: var(--color-primary-600);
}

/* ── 每日记录卡片 ── */
.daily-card {
    transition: all var(--transition);
}
.daily-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

/* ── 主题列表 ── */
.topic-list-item {
    min-height: 80px;
    padding: 0 !important;
    border-left: none !important;
    transition: background var(--transition);
}
.topic-list-item:hover {
    background: var(--color-surface-2);
}
.topic-color-bar {
    width: 8px;
    min-height: 80px;
    align-self: stretch;
    border-radius: 4px 0 0 4px;
    margin-right: 16px;
}
.topic-list-item a {
    padding: 16px 0;
}

/* ── 快捷入口卡片 ── */
.quick-entry-card {
    transition: all var(--transition);
    border: 1px solid var(--color-border);
}
.quick-entry-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
    border-color: var(--color-primary-300);
}

/* ── AI 周报总结文本 ── */
.ai-summary-text {
    font-size: var(--fs-sm);
    line-height: var(--lh-base);
    white-space: pre-wrap;
}
.ai-summary-text strong {
    color: var(--color-text-1);
    font-weight: 600;
}

/* ── 剪藏步骤 ── */
.clip-step {
    display: flex;
    padding-bottom: 1rem;
    margin-bottom: 1rem;
    border-bottom: 1px dashed var(--color-border);
}

/* ── 分组卡片 ── */
.group-card {
    min-height: 140px;
    transition: all var(--transition);
}
.group-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

/* ── 回收站行 ── */
.trash-row {
    min-height: 56px;
    transition: background var(--transition);
}
.trash-row:hover {
    background: var(--color-surface-2);
}

/* ── 按钮系统 v3 ── */
.btn {
    border-radius: var(--radius-sm);
    font-weight: 500;
    padding: 10px 20px;
    transition: all var(--transition);
}
.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none !important;
    box-shadow: none !important;
}
.btn:hover:not(:disabled) {
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(58,111,176,0.25);
}
.btn:active:not(:disabled) {
    transform: translateY(0);
}

/* Primary — 一般主操作 */
.btn-primary {
    background: var(--color-primary-500);
    border-color: var(--color-primary-500);
    color: #fff;
}
.btn-primary:hover:not(:disabled) {
    background: var(--color-primary-600);
    border-color: var(--color-primary-600);
}
.btn-outline-primary {
    color: var(--color-primary-500);
    border-color: var(--color-primary-500);
}
.btn-outline-primary:hover:not(:disabled) {
    background: var(--color-primary-500);
    border-color: var(--color-primary-500);
    color: #fff;
}

/* Accent — 高优 CTA（注册、新建、保存发布） */
.btn-accent {
    background: var(--color-accent-500);
    border-color: var(--color-accent-500);
    color: #fff;
    font-weight: 600;
}
.btn-accent:hover:not(:disabled) {
    background: #d4813a;
    border-color: #d4813a;
    color: #fff;
    box-shadow: 0 4px 14px rgba(232,147,72,0.35);
}

/* Success — 确认/安全操作（恢复、完成、通过） */
.btn-success {
    background: var(--color-success);
    border-color: var(--color-success);
    color: #fff;
}
.btn-success:hover:not(:disabled) {
    background: #277d56;
    border-color: #277d56;
}
.btn-outline-success {
    color: var(--color-success);
    border-color: var(--color-success);
}
.btn-outline-success:hover:not(:disabled) {
    background: var(--color-success);
    border-color: var(--color-success);
    color: #fff;
}

/* Danger — 危险操作（清空、永久删除） */
.btn-danger {
    background: var(--color-danger);
    border-color: var(--color-danger);
    color: #fff;
}
.btn-danger:hover:not(:disabled) {
    background: #a33028;
    border-color: #a33028;
}
.btn-outline-danger {
    color: var(--color-danger);
    border-color: var(--color-danger);
}
.btn-outline-danger:hover:not(:disabled) {
    background: var(--color-danger);
    border-color: var(--color-danger);
    color: #fff;
}

/* Ghost — 文字链 / 取消 */
.btn-ghost {
    background: transparent;
    border-color: transparent;
    color: var(--color-text-2);
}
.btn-ghost:hover:not(:disabled) {
    background: rgba(0,0,0,0.04);
    color: var(--color-text-1);
}
[data-bs-theme="dark"] .btn-ghost:hover:not(:disabled),
[data-theme="dark"] .btn-ghost:hover:not(:disabled) {
    background: rgba(255,255,255,0.06);
    color: var(--color-text-1);
}

/* 尺寸变体 */
.btn-sm { padding: 5px 12px; font-size: 0.85rem; }
.btn-lg { padding: 14px 36px; font-size: 16.5px; font-weight: 600; border-radius: var(--radius-md); }

/* ── Chip 标签 v3 ── */
.chip {
    display: inline-flex;
    align-items: center;
    height: 24px;
    padding: 0 10px;
    border-radius: 12px;
    font-size: var(--fs-xs);
    font-weight: 500;
    white-space: nowrap;
    transition: all var(--transition);
}
.chip-default {
    background: var(--color-primary-50);
    color: var(--color-primary-700);
}
.chip-success {
    background: #d4f4e2;
    color: var(--color-success);
}
.chip-warning {
    background: #fbe8d4;
    color: var(--color-warning);
}
.chip-danger {
    background: #fbe0dc;
    color: var(--color-danger);
}
.chip-info {
    background: var(--color-primary-100);
    color: var(--color-primary-600);
}

/* ── 徽章 ── */
.badge {
    font-weight: 500;
    padding: 4px 10px;
    border-radius: 6px;
}

/* ── 列表组 ── */
.list-group-item {
    background: var(--bg-card);
    border-color: var(--border-color);
    padding: var(--space-md);
    transition: background var(--transition);
}
.list-group-item:hover {
    background: rgba(0,0,0,0.02);
}
[data-bs-theme="dark"] .list-group-item:hover,
[data-theme="dark"] .list-group-item:hover {
    background: rgba(255,255,255,0.03);
}
/* 列表行：下拉菜单打开时提升整行层级，避免菜单被下一行按钮遮挡 */
.list-group-item:has(.dropdown-menu.show) {
    z-index: 10 !important;
}
/* 批量选择复选框：压过 stretched-link 的 ::after 伪元素(z-index:1)，点击不再误触笔记 */
.bulk-check {
    position: relative;
    z-index: 2;
}

/* ── 表单控件 v3 ── */
.form-control, .form-select {
    min-height: 44px;
    padding: 0 12px;
    border-radius: 8px;
    border: 1px solid var(--color-border);
    background: var(--color-surface);
    color: var(--color-text-1);
    font-size: var(--fs-sm);
    transition: all var(--transition);
}
.form-control:focus, .form-select:focus {
    border-color: var(--color-primary-500);
    box-shadow: 0 0 0 3px rgba(58,111,176,0.15);
    outline: none;
}
.form-control.is-invalid, .form-select.is-invalid {
    border-color: var(--color-danger);
}
.form-control.is-invalid:focus, .form-select.is-invalid:focus {
    box-shadow: 0 0 0 3px rgba(192,57,43,0.15);
}
.invalid-feedback {
    font-size: var(--fs-xs);
    color: var(--color-danger);
}

/* 暗色模式表单 */
[data-bs-theme="dark"] .form-control,
[data-theme="dark"] .form-control,
[data-bs-theme="dark"] .form-select,
[data-theme="dark"] .form-select {
    background: var(--color-surface);
    border-color: var(--color-border);
    color: var(--color-text-1);
}

/* ── 空状态 v3 ── */
.empty-state {
    text-align: center;
    padding: var(--space-2xl) var(--space-lg);
}
.empty-state-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto var(--space-6);
    color: var(--color-text-3);
    opacity: 0.6;
}
.empty-state-title {
    font-size: var(--fs-lg);
    font-weight: 600;
    color: var(--color-text-1);
    margin-bottom: var(--space-2);
}
.empty-state-desc {
    font-size: var(--fs-sm);
    color: var(--color-text-2);
    margin-bottom: var(--space-6);
    max-width: 360px;
    margin-left: auto;
    margin-right: auto;
}

/* ── 告警 ── */
.alert {
    border-radius: var(--radius-sm);
    border: none;
}

/* ── 模态框 ── */
.modal-content {
    border-radius: var(--radius-lg);
    border: none;
    box-shadow: var(--shadow-lg);
}

/* ── 分页 ── */
.pagination .page-link {
    border-radius: var(--radius-sm);
    margin: 0 2px;
    border-color: var(--border-color);
    color: var(--text-primary);
    transition: all var(--transition);
}
.pagination .page-item.active .page-link {
    background: var(--color-primary);
    border-color: var(--color-primary);
}

/* ── 下拉菜单 ── */
.dropdown-menu {
    border-radius: var(--radius-sm);
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-md);
    padding: var(--space-sm) 0;
}
.dropdown-item {
    padding: var(--space-sm) var(--space-md);
    border-radius: 4px;
    margin: 2px var(--space-sm);
    transition: all var(--transition);
}

/* ── 头像 ── */
.user-avatar {
    width: 36px; height: 36px;
    border-radius: 50%;
    object-fit: cover;
    border: 2px solid rgba(255,255,255,0.3);
    transition: all var(--transition);
}
.user-avatar:hover {
    border-color: rgba(255,255,255,0.7);
    transform: scale(1.05);
}
.avatar-large {
    width: 140px; height: 140px;
    border-radius: 50%;
    object-fit: cover;
    border: 3px solid var(--border-color);
    box-shadow: var(--shadow-md);
}

/* ── 头像上传 ── */
.avatar-upload-wrapper { position: relative; display: inline-block; }
.avatar-upload-btn {
    position: absolute; bottom: 8px; right: 8px;
    background: var(--bg-card); border-radius: 50%;
    width: 34px; height: 34px;
    display: flex; align-items: center; justify-content: center;
    cursor: pointer; box-shadow: var(--shadow-md);
    transition: all var(--transition);
}
.avatar-upload-btn:hover {
    background: var(--color-primary);
    color: #fff;
    transform: scale(1.1);
}

/* ── 主题切换按钮 ── */
.theme-toggle {
    position: relative; width: 56px; height: 28px;
    border-radius: 14px; background: #cbd5e1;
    cursor: pointer; transition: all var(--transition);
    border: none; box-shadow: inset 0 1px 3px rgba(0,0,0,0.15);
    display: inline-block; vertical-align: middle;
}
.theme-toggle.dark { background: #475569; }
.theme-toggle::before {
    content: ''; position: absolute;
    width: 22px; height: 22px; border-radius: 50%;
    background: #fff; top: 3px; left: 3px;
    transition: all var(--transition);
    box-shadow: 0 1px 3px rgba(0,0,0,0.2);
}
.theme-toggle.dark::before { transform: translateX(28px); }
.theme-toggle::after {
    content: '☀️'; position: absolute; font-size: 11px; right: 6px; top: 4px;
}
.theme-toggle.dark::after { content: '🌙'; left: 6px; right: auto; }

/* ── FAB 浮动按钮 ── */
.fab-btn {
    width: 52px; height: 52px;
    border-radius: 50%;
    box-shadow: var(--shadow-lg);
    transition: all var(--transition);
}
.fab-btn:hover {
    transform: scale(1.08);
    box-shadow: 0 12px 36px rgba(0,0,0,0.12);
}

/* ── 文本工具类 ── */
.text-secondary { color: var(--text-secondary) !important; }
.text-muted { color: var(--text-muted) !important; }
small.text-muted { color: var(--text-secondary) !important; }

/* ── 响应式 ── */
@media (max-width: 768px) {
    :root {
        --space-lg: 16px;
        --space-xl: 24px;
        --radius-md: 10px;
    }
    .card-body { padding: var(--space-md); }
    .theme-toggle { width: 48px; height: 24px; }
    .theme-toggle::before { width: 18px; height: 18px; }
    .theme-toggle.dark::before { transform: translateX(24px); }

    /* 移动端全局调整 */
    body { padding-bottom: 70px; } /* 给底部导航栏留空间 */
    .container { padding-left: 12px; padding-right: 12px; }
    h1, .h1 { font-size: 1.5rem; }
    h2, .h2 { font-size: 1.3rem; }
    h3, .h3 { font-size: 1.15rem; }

    /* 表格横向滚动 */
    table { display: block; overflow-x: auto; white-space: nowrap; }

    /* 编辑器工具栏换行 */
    .editor-toolbar { flex-wrap: wrap; gap: 4px !important; }
    .editor-toolbar .btn { font-size: 0.78rem; padding: 4px 8px; }

    /* FAB 移动端隐藏（用底部导航替代） */
    .fab-btn { display: none !important; }
    .dropup { display: none !important; }

    /* 回到顶部按钮上移 */
    #backToTop { bottom: 80px; right: 16px; width: 38px; height: 38px; font-size: 1rem; }

    /* 模态框全屏 */
    .modal-dialog { margin: 0.5rem; }
    .modal-dialog.modal-lg { max-width: calc(100vw - 1rem); }

    /* 编辑器列全宽 */
    #markdown-editor .col-md-6,
    #richtext-editor .col-12 { flex: 0 0 100%; max-width: 100%; }

    /* AI 浮动面板移动端全宽 */
    .ai-sidebar { width: 100vw !important; }

    /* 语音面板移动端适配 */
    .voice-transcript-panel { width: calc(100vw - 32px) !important; right: 16px !important; max-height: 360px !important; }
}

/* ── 移动端底部导航栏 ── */
.mobile-bottom-nav {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    height: 58px;
    background: var(--bg-card);
    border-top: 1px solid var(--border-color);
    display: flex;
    justify-content: space-around;
    align-items: center;
    z-index: 1050;
    padding-bottom: env(safe-area-inset-bottom, 0);
    box-shadow: 0 -2px 10px rgba(0,0,0,0.06);
}
.mobile-nav-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-decoration: none;
    color: var(--text-muted);
    font-size: 0.68rem;
    padding: 4px 12px;
    border-radius: 8px;
    transition: all 0.15s;
    min-width: 56px;
}
.mobile-nav-item i { font-size: 1.25rem; margin-bottom: 1px; }
.mobile-nav-item.active { color: var(--color-primary); }
.mobile-nav-item:active { background: rgba(91,140,184,0.1); }
.mobile-nav-add { position: relative; }
.mobile-add-btn {
    width: 42px; height: 42px;
    background: var(--color-primary);
    color: #fff;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.3rem;
    box-shadow: 0 2px 8px rgba(91,140,184,0.35);
    transition: all 0.2s;
    margin-top: -18px;
}
.mobile-add-btn:active { transform: scale(0.92); }

/* 暗色模式底部导航 */
[data-bs-theme="dark"] .mobile-bottom-nav,
[data-theme="dark"] .mobile-bottom-nav { background: #282c34; border-color: #3a4048; }

/* ── 星级评分 ── */
.star-rating { display: inline-flex; gap: 2px; }
.star-rating .star { transition: color 0.15s; user-select: none; }
.star-rating .star:hover { transform: scale(1.15); }

/* ── AI 面板拖拽调整 ── */
.ai-sidebar-resize-handle {
    position: absolute;
    left: 0;
    top: 0;
    width: 6px;
    height: 100%;
    cursor: col-resize;
    z-index: 10;
    background: transparent;
    transition: background 0.2s;
}
.ai-sidebar-resize-handle:hover,
.ai-sidebar-resize-handle.dragging {
    background: var(--color-primary);
    opacity: 0.6;
}
.ai-sidebar.resizing { transition: none !important; user-select: none; }
.ai-sidebar.ai-dragging { box-shadow: -4px 0 32px rgba(0,0,0,0.3) !important; opacity: 0.92; }

/* 编辑器拖拽手柄 */
.editor-resize-handle {
    position: absolute;
    right: 0;
    top: 0;
    width: 6px;
    height: 100%;
    cursor: col-resize;
    z-index: 10;
    background: transparent;
    transition: background 0.2s;
}
.editor-resize-handle:hover,
.editor-resize-handle.dragging {
    background: var(--color-primary);
    opacity: 0.6;
}

/* FAB 恢复按钮 */
#fabRestore:hover { right: 0 !important; background: var(--color-primary-hover, #4a7a9e); }

/* ── Markdown 帮助面板 ── */
.help-snippet { cursor: pointer; transition: all 0.15s; border: 1px solid transparent; }
.help-snippet:hover { background: var(--color-primary); color: #fff; border-color: var(--color-primary); }
[data-bs-theme="dark"] .help-snippet,
[data-theme="dark"] .help-snippet { background: #1e2127; color: #c0c8d4; border-color: #3a4048; }
[data-bs-theme="dark"] .help-snippet:hover,
[data-theme="dark"] .help-snippet:hover { background: var(--color-primary); color: #fff; }

/* ── 笔记配置面板 ── */
#noteConfigPanel .form-select-sm,
#noteConfigPanel .form-control-sm { font-size: 0.8rem; }
[data-bs-theme="dark"] #noteConfigPanel,
[data-theme="dark"] #noteConfigPanel { background: #2a2e36 !important; }

/* ── 暗色模式：AI 聊天区 ── */
[data-bs-theme="dark"] .ai-chat-container,
[data-theme="dark"] .ai-chat-container { background: #1e2127 !important; border-color: #3a4048 !important; }
[data-bs-theme="dark"] .ai-message-content.bg-light,
[data-theme="dark"] .ai-message-content.bg-light { background: #2a2e36 !important; color: #e8ecf2 !important; }
[data-bs-theme="dark"] .ai-message-content.bg-primary,
[data-theme="dark"] .ai-message-content.bg-primary { background: #3a6090 !important; }
[data-bs-theme="dark"] .ai-response-text,
[data-theme="dark"] .ai-response-text { color: #e8ecf2; }
[data-bs-theme="dark"] #ai-message-input,
[data-theme="dark"] #ai-message-input { background: #1e2127; color: #e8ecf2; border-color: #3a4048; }

/* ── 暗色模式：内容预览区 ── */
[data-bs-theme="dark"] .content-preview,
[data-theme="dark"] .content-preview { color: #e8ecf2; }
[data-bs-theme="dark"] .content-box.bg-light,
[data-theme="dark"] .content-box.bg-light { background: #2a2e36 !important; }
[data-bs-theme="dark"] .richtext-content,
[data-theme="dark"] .richtext-content { color: #e8ecf2; }
[data-bs-theme="dark"] .richtext-content table,
[data-theme="dark"] .richtext-content table { border-color: #3a4048; }
[data-bs-theme="dark"] .richtext-content td,
[data-theme="dark"] .richtext-content td,
[data-bs-theme="dark"] .richtext-content th,
[data-theme="dark"] .richtext-content th { border-color: #3a4048; padding: 4px 8px; }

/* ── 暗色模式：编辑器 Summernote ── */
[data-bs-theme="dark"] .note-editor,
[data-theme="dark"] .note-editor { background: #1e2127; }
[data-bs-theme="dark"] .note-editing-area,
[data-theme="dark"] .note-editing-area { background: #1e2127; color: #e8ecf2; }
[data-bs-theme="dark"] .note-editable,
[data-theme="dark"] .note-editable { background: #1e2127 !important; color: #e8ecf2 !important; }
[data-bs-theme="dark"] .note-toolbar,
[data-theme="dark"] .note-toolbar { background: #2a2e36; border-color: #3a4048; }
[data-bs-theme="dark"] .note-btn,
[data-theme="dark"] .note-btn { background: #2a2e36; color: #c0c8d4; border-color: #3a4048; }
[data-bs-theme="dark"] .note-btn:hover,
[data-theme="dark"] .note-btn:hover { background: #3a4048; color: #fff; }

/* ── 暗色模式：TOC和筛选 ── */
[data-bs-theme="dark"] .toc-panel,
[data-theme="dark"] .toc-panel { background: #2a2e36 !important; color: #c0c8d4; }
[data-bs-theme="dark"] .toc-panel a,
[data-theme="dark"] .toc-panel a { color: #7ab8e0; }
[data-bs-theme="dark"] #entryFilter,
[data-theme="dark"] #entryFilter { background: #1e2127; color: #e8ecf2; border-color: #3a4048; }
[data-bs-theme="dark"] #entryFilter::placeholder,
[data-theme="dark"] #entryFilter::placeholder { color: #6b7580; }

/* ── 暗色模式：代码块 ── */
[data-bs-theme="dark"] .markdown-content pre,
[data-theme="dark"] .markdown-content pre { background: #1a1d21 !important; color: #c0c8d4; border: 1px solid #3a4048; }
[data-bs-theme="dark"] .markdown-content code,
[data-theme="dark"] .markdown-content code { color: #e0c080; background: #2a2e36; }
[data-bs-theme="dark"] .markdown-content pre code,
[data-theme="dark"] .markdown-content pre code { color: #c0c8d4; background: transparent; }
[data-bs-theme="dark"] .pagination .page-link,
[data-theme="dark"] .pagination .page-link { background: #2a2e36; color: #c0c8d4; border-color: #3a4048; }
[data-bs-theme="dark"] .pagination .page-item.active .page-link,
[data-theme="dark"] .pagination .page-item.active .page-link { background: var(--color-primary); border-color: var(--color-primary); color: #fff; }

/* ── 暗色模式：AI 右侧浮动面板 ── */
[data-bs-theme="dark"] .ai-sidebar,
[data-theme="dark"] .ai-sidebar { background: #282c34 !important; }
[data-bs-theme="dark"] .ai-sidebar .card-body,
[data-theme="dark"] .ai-sidebar .card-body { background: #282c34; color: #e8ecf2; }

/* ── 暗色模式：语音转录面板 ── */
[data-bs-theme="dark"] .voice-transcript-panel,
[data-theme="dark"] .voice-transcript-panel { background: #282c34 !important; border-color: #3a4048 !important; }
[data-bs-theme="dark"] .voice-transcript-panel .card-body,
[data-theme="dark"] .voice-transcript-panel .card-body { background: #282c34; }
[data-bs-theme="dark"] .voice-transcript-panel .voice-text,
[data-theme="dark"] .voice-transcript-panel .voice-text { color: #c0c8d4; }

/* ── 语音按钮录制中动画 ── */
.voice-input-btn.btn-danger {
    animation: voice-pulse 1.2s ease-in-out infinite;
}
.voice-input-btn.btn-warning {
    animation: voice-pulse-warn 1.5s ease-in-out infinite;
}
@keyframes voice-pulse {
    0%, 100% { box-shadow: 0 0 0 0 rgba(220,53,69,0.4); }
    50% { box-shadow: 0 0 0 8px rgba(220,53,69,0); }
}
@keyframes voice-pulse-warn {
    0%, 100% { box-shadow: 0 0 0 0 rgba(255,193,7,0.4); }
    50% { box-shadow: 0 0 0 8px rgba(255,193,7,0); }
}

/* ─────────────────────────────────────────
   Stage 1 UI统一覆盖层
   全站层优先：背景、Header、按钮、卡片、表单。
   ───────────────────────────────────────── */
body {
    background: var(--sg-bg);
    color: var(--sg-text-primary);
    font-size: var(--sg-body);
}

a {
    color: var(--sg-primary);
}

a:hover {
    color: var(--sg-primary-hover);
}

.custom-navbar {
    min-height: 56px;
    background: var(--sg-surface) !important;
    border-bottom: 1px solid var(--sg-border);
    box-shadow: none;
    backdrop-filter: none;
}

.custom-navbar .navbar-brand,
.custom-navbar .navbar-brand:hover,
.custom-navbar .navbar-brand:focus {
    color: var(--sg-text-primary);
}

.custom-navbar .navbar-nav .nav-link {
    color: var(--sg-text-secondary);
}

.custom-navbar .navbar-nav .nav-link:hover,
.custom-navbar .navbar-nav .nav-link:focus,
.custom-navbar .navbar-nav .show > .nav-link {
    color: var(--sg-primary);
    background: var(--sg-primary-light);
}

.custom-navbar .navbar-toggler {
    border-color: var(--sg-border);
}

.nav-link {
    min-height: 40px;
    border-radius: var(--sg-radius-btn);
    font-size: var(--sg-body);
}

.nav-link.active,
.nav-link[aria-current="page"] {
    color: var(--sg-primary) !important;
}

.nav-link.active::after,
.nav-link[aria-current="page"]::after {
    background: var(--sg-primary);
}

/* nav-pills（如登录页 Tab）激活项是填充背景，必须白字，避免被上面的品牌蓝 !important 覆盖成蓝字蓝底 */
.nav-pills .nav-link.active,
.nav-pills .nav-link.active:hover,
.nav-pills .nav-link.active:focus {
    color: #fff !important;
    background-color: var(--bs-nav-pills-link-active-bg, #0d6efd) !important;
}
.nav-pills .nav-link.active::after,
.nav-pills .nav-link.active:focus::after {
    display: none;
}

#searchForm .input-group {
    min-width: min(360px, 100%);
}

#searchForm .form-control {
    min-height: 40px;
}

#searchForm .btn-outline-light,
.navbar .btn-outline-light {
    background: transparent;
    border-color: var(--sg-border);
    color: var(--sg-text-secondary);
}

#searchForm .btn-outline-light:hover,
.navbar .btn-outline-light:hover {
    border-color: var(--sg-primary);
    color: var(--sg-primary);
    background: var(--sg-primary-light);
}

.card {
    background: var(--sg-surface);
    border: 1px solid var(--sg-divider);
    border-radius: var(--sg-radius-card);
    box-shadow: var(--sg-shadow-card);
}

.card:hover {
    transform: none;
    box-shadow: var(--sg-shadow-card-hover);
}

.card-header,
.card > .card-header.bg-primary,
.card > .card-header.bg-warning,
.card > .card-header.bg-info,
.card > .card-header.bg-success,
.card > .card-header.bg-light,
.card > .card-header.bg-white {
    background: var(--sg-surface) !important;
    color: var(--sg-text-primary) !important;
    border-bottom: 1px solid var(--sg-divider);
    font-size: var(--sg-h3);
    font-weight: 600;
}

.card-body {
    color: var(--sg-text-primary);
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    min-height: 40px;
    padding: 8px 16px;
    border-radius: var(--sg-radius-btn);
    font-size: var(--sg-body);
    font-weight: 500;
    box-shadow: none;
}

.btn-sm {
    min-height: 32px;
    padding: 6px 12px;
    font-size: var(--sg-body-sm);
}

.btn-lg {
    min-height: 48px;
    padding: 12px 24px;
    font-size: 16px;
}

.btn:hover:not(:disabled) {
    transform: none;
    box-shadow: none;
}

.btn:active:not(:disabled) {
    transform: scale(0.98);
}

.btn-primary,
.btn-accent,
.btn-warning,
.btn-success {
    background: var(--sg-primary);
    border-color: var(--sg-primary);
    color: #fff;
}

.btn-primary:hover:not(:disabled),
.btn-accent:hover:not(:disabled),
.btn-warning:hover:not(:disabled),
.btn-success:hover:not(:disabled) {
    background: var(--sg-primary-hover);
    border-color: var(--sg-primary-hover);
    color: #fff;
}

.btn-secondary {
    background: var(--sg-surface-hover);
    border-color: var(--sg-surface-hover);
    color: var(--sg-text-primary);
}

.btn-outline-primary,
.btn-outline-secondary,
.btn-outline-info,
.btn-outline-success,
.btn-outline-warning,
.btn-outline-dark {
    background: transparent;
    border-color: var(--sg-border);
    color: var(--sg-text-secondary);
}

.btn-outline-primary:hover:not(:disabled),
.btn-outline-secondary:hover:not(:disabled),
.btn-outline-info:hover:not(:disabled),
.btn-outline-success:hover:not(:disabled),
.btn-outline-warning:hover:not(:disabled),
.btn-outline-dark:hover:not(:disabled) {
    background: var(--sg-primary-light);
    border-color: var(--sg-primary);
    color: var(--sg-primary);
}

.btn-danger {
    background: #fee2e2;
    border-color: #fee2e2;
    color: var(--sg-danger);
}

.btn-danger:hover:not(:disabled) {
    background: #fecaca;
    border-color: #fecaca;
    color: var(--sg-danger);
}

.btn-outline-danger {
    background: transparent;
    border-color: #fecaca;
    color: var(--sg-danger);
}

.btn-outline-danger:hover:not(:disabled) {
    background: #fee2e2;
    border-color: #fecaca;
    color: var(--sg-danger);
}

.form-control,
.form-select {
    min-height: 40px;
    border-color: var(--sg-border);
    border-radius: var(--sg-radius-input);
    background: var(--sg-surface);
    color: var(--sg-text-primary);
    font-size: var(--sg-body);
}

.form-control:focus,
.form-select:focus {
    border-color: var(--sg-primary);
    box-shadow: 0 0 0 3px rgba(79,110,247,0.1);
}

.form-control::placeholder {
    color: var(--sg-text-tertiary);
}

.list-group {
    gap: 12px;
}

.list-group-flush {
    gap: 0;
}

.list-group-item {
    border-color: var(--sg-divider);
    color: var(--sg-text-primary);
}

.list-group-item-action:hover,
.topic-list-item:hover,
.trash-row:hover {
    background: var(--sg-surface-hover);
}

.badge.bg-primary,
.progress-bar.bg-primary {
    background-color: var(--sg-primary) !important;
}

.badge.bg-warning {
    background-color: #fef3c7 !important;
    color: #92400e !important;
}

.badge.bg-success {
    background-color: #dcfce7 !important;
    color: #166534 !important;
}

.badge.bg-info {
    background-color: #dbeafe !important;
    color: #1e40af !important;
}

.chip,
.badge.rounded-pill {
    border-radius: var(--sg-radius-tag);
}

.text-primary {
    color: var(--sg-primary) !important;
}

.text-success {
    color: var(--sg-success) !important;
}

.text-warning {
    color: var(--sg-warning) !important;
}

.text-muted,
small.text-muted {
    color: var(--sg-text-secondary) !important;
}

.topic-color-bar {
    display: none;
}

.app-footer {
    background: var(--sg-surface);
    border-top: 1px solid var(--sg-border);
    color: var(--sg-text-secondary);
    font-size: var(--sg-body-sm);
}

.app-footer a {
    color: var(--sg-text-secondary);
}

.app-footer a:hover {
    color: var(--sg-primary);
}

/* ── 页脚备案信息（工信部 ICP + 公安联网备案，法定公示） ── */
.sg-filing {
    display: flex;
    flex-wrap: wrap;          /* 手机上两个备案号各自换行，不挤成一片 */
    align-items: center;
    justify-content: center;
    gap: 2px 14px;
    margin-top: 6px;
    font-size: 0.92em;
}

.sg-filing a {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    white-space: nowrap;      /* 号码本身不折行 */
}

/* 警徽图标：官方素材（36×40，保留原色，不随主题变色） */
.sg-filing-badge {
    height: 14px;
    width: auto;              /* 保持 36:40 原始比例，不拉伸 */
    flex: 0 0 auto;
}

@media (max-width: 767.98px) {
    /* 手机端备案号适度放大（页脚默认字号在手机上只有 ~12px，属于「微字」）；
       仍小于正文，避免法定信息抢占视觉重心。

       改为纵向堆叠：右下角「回到顶部」悬浮按钮固定在视口右下，
       横排时公安备案号结尾会被它压住（法定信息不能遮挡），
       竖排后每行都窄，彻底避开。 */
    .sg-filing {
        flex-direction: column;
        font-size: 13px;
        gap: 2px;
    }
    .sg-filing-badge {
        height: 15px;
    }
}

#quickPanel {
    border: 1px solid var(--sg-border) !important;
    border-radius: var(--sg-radius-modal) !important;
    box-shadow: var(--sg-shadow-modal) !important;
}

[data-bs-theme="dark"],
[data-theme="dark"] {
    --color-bg: var(--sg-bg);
    --color-surface: var(--sg-surface);
    --color-surface-2: var(--sg-surface-hover);
    --color-border: var(--sg-border);
    --color-text-1: var(--sg-text-primary);
    --color-text-2: var(--sg-text-secondary);
    --color-text-3: var(--sg-text-tertiary);
}

[data-bs-theme="dark"] .custom-navbar,
[data-theme="dark"] .custom-navbar,
[data-bs-theme="dark"] .app-footer,
[data-theme="dark"] .app-footer {
    background: var(--sg-surface) !important;
    border-color: var(--sg-border);
}

[data-bs-theme="dark"] .custom-navbar .navbar-brand,
[data-theme="dark"] .custom-navbar .navbar-brand {
    color: var(--sg-text-primary);
}

[data-bs-theme="dark"] .custom-navbar .navbar-nav .nav-link,
[data-theme="dark"] .custom-navbar .navbar-nav .nav-link {
    color: var(--sg-text-secondary);
}

/* ── 编辑器 AI：来源引用知识卡片（C2）── */
.ai-citations {
    margin-top: 8px;
    padding-top: 6px;
    border-top: 1px dashed var(--border-color, #e8e4e0);
}
.ai-citations-toggle {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    background: none;
    border: none;
    color: var(--color-primary, #0d6efd);
    font-size: 0.8rem;
    cursor: pointer;
    padding: 2px 0;
    font-weight: 600;
}
.ai-citations-toggle:hover { text-decoration: underline; }
.ai-citations-arrow { transition: transform 0.15s; font-size: 0.7rem; }
.ai-citations-list {
    margin-top: 6px;
    display: flex;
    flex-direction: column;
    gap: 5px;
}
.ai-citation-item {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 5px 8px;
    background: rgba(var(--color-primary-rgb, 13,110,253), 0.06);
    border: 1px solid rgba(var(--color-primary-rgb, 13,110,253), 0.15);
    border-radius: 8px;
    font-size: 0.78rem;
}
.ai-citation-name {
    flex: 1;
    min-width: 0;
    color: var(--text-primary, #2c3e50);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}
.ai-citation-actions { display: flex; gap: 4px; flex-shrink: 0; }
.ai-cite-insert {
    background: var(--color-primary, #0d6efd);
    color: #fff;
    border: none;
    border-radius: 6px;
    font-size: 0.68rem;
    padding: 2px 8px;
    cursor: pointer;
}
.ai-cite-insert:disabled { opacity: 0.6; }
.ai-cite-view {
    background: rgba(var(--color-primary-rgb, 13,110,253), 0.08);
    color: var(--color-primary, #0d6efd);
    border: 1px solid rgba(var(--color-primary-rgb, 13,110,253), 0.25);
    border-radius: 6px;
    font-size: 0.68rem;
    padding: 1px 8px;
    text-decoration: none;
}
.ai-cite-view:hover { background: rgba(var(--color-primary-rgb, 13,110,253), 0.16); }
[data-bs-theme="dark"] .ai-citation-name,
[data-theme="dark"] .ai-citation-name { color: #e8ecf2; }
[data-bs-theme="dark"] .ai-citation-item {
    background: rgba(138,180,248,0.08);
    border-color: rgba(138,180,248,0.2);
}